Irish Cream

3 Irish monks have passed all tests, except for one. It is the test of purity. So the other monks tie bells to their dicks and put them in a room with a naked chick. She dances in front of the first one, and, sure enough, he goes 'ding-ding!'

"Go take a cold shower, now!" she commands, and he goes to take a shower. So she dances in front of the next one, and, after a couple of minutes, he goes 'ding-ding!'

"Go take a cold shower with your brother!" she yells, and he leaves. Now she goes to the last one, dancing in front of him. He doesnt ring. The woman nods.